Installation Guide Manual

JB1
JA1
JB
JA
U
PS
1
JA1
JB1
U
P
S
2
JA2
u
n
i
t
3
,
4
,
5
,
N
e
x
t
p
a
r
a
l
l
e
l
JB2
6
,
7
,
8
JB2
JB1
JA2
JA1
JA
JB
SGT5000_050-080_RPA control bus cable_02b_US
JA2
Q1
Q2
OFF
ONON
OFF
Q2
OFF
ON
OFF
ON
Q1
JB2
A
A
Fig. 3.9.3-3 Control Bus cable routing and connection
Control bus cables routing
Place and fix the cables JA-1/2/3/4/5/6/7 and JB-1/2/3/4/5/6/7 with the appropriate clamps inside
the UPS cabinets in the position shown in the drawing Fig 3.9.3-1/2/3.
Pay attention to the fact, that routing of cables shall allow the removal of the protection covers “A”.
NOTE !
Pay attention when cabling and routing the bus cables JA and JB inside the UPS
cabinet.
In case one unit should be removed from the parallel system, the bus cables JA and
JB must be removed from the cabinet without disconnecting them from the metal
plate where the sockets JA and JB are located.
For reliability reasons the cables JA-1/2/3/4/5/6/7 and JB-1/2/3/4/5/6/7 connecting the units should
be run in separated protected conduits (as indicated in Fig. 3.9.3-3) separated from the power
cables.
It is important that the cable JA must be the same length as cable JB.
WARNING !
Connection and commissioning of an additional UPS to an existing parallel system,
must be performed by a service engineer from of your Service Center.
Modifications reserved Page 33/38
OPM_SGS_ISG_50K_80K_0US_V040.doc Installation Guide SG Series 50 & 80 kVA